港珠澳大桥青州航道桥抗风性能研究  

Investigation of Wind-Resistant Performance of Qingzhou Ship Channel Bridge of Hong Kong-Zhuhai-Macao Bridge

作　　者：胡传新 周志勇[1] 秦鹏 HU Chuan-xin;ZHOU Zhi-yong;QIN Peng(State Key Laboratory for Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《桥梁建设》2018年第2期1-6,共6页Bridge Construction

摘　　要：为了检验港珠澳大桥青州航道桥的风致稳定性,对其抗风性能进行研究。采用主梁节段模型风洞试验研究主梁的涡振性能和颤振性能,采用桥塔气弹模型风洞试验研究桥塔自立状态的驰振性能和涡振性能,采用ANSYS软件进行全桥有限元分析研究该桥的静风稳定性。结果表明:港珠澳大桥青州航道桥主梁原始断面和增加风嘴断面涡振性能不满足规范要求,在人行道栏杆上方增设抑流板后涡振性能满足要求;主梁原始断面和增加风嘴断面满足颤振稳定性要求,增加抑流板断面在+5°风攻角下的颤振稳定性不满足要求;桥塔的驰振性能满足要求;均匀流场和紊流场下,桥塔仅在风偏角较小时出现扭转涡振;各初始风攻角下,该桥的静风稳定临界风速均远大于静风失稳检验风速,静风稳定性满足规范要求。To check up the wind stability of the Qingzhou Ship Channel Bridge of the Hong Kong-Zhuhai-Macao Bridge,the wind-resistant performance of the bridge was investigated.The vortex-induced vibration(V IV)performance and flutter performance of the main girder of the bridge was studied by means of the sectional model test of the girder in the wind tunnel and the galloping performance and VIV performance of the self-supporting pylon was studied with the help of the aeroelastic model test of the pylon also in the wind tunnel.The finite element analysis for the whole bridge of the bridge was conducted,using the software ANSYS and the aerostatic stability of the bridge was studied.The results demonstrate that the VIV performance of the original section and the section added with the wind fairings of the main girder of the bridge can not meet the relevant requirements in the codes,however,after the air flow suppression boards are added to upper parts of the pedestrian walk handrails,the VIV performance can meet the requirements.The original section and the section added with the wind fairings can meet the flutter stability requirements,however,the flutter stability of the section added with the air flow suppression boards can not meet the requirements at the wind attack angle of+5°.The galloping performance of the pylon can meet the requirements.In the uniform and turbulent flow fields,the torsional VIV occurs in the pylon only at the small wind yaw angles.Under the different initial wind attack angles,the critical wind velocities of the aerostatic stability of the bridge are far greater than the checking wind velocity of the aerostatic instability and the aerostatic stability can meet the requirements in the codes.

关 键 词：斜拉桥 抗风性能 节段模型 风洞试验 涡振 颤振 驰振 静风稳定性 

分 类 号：U443.3[建筑科学—桥梁与隧道工程] U441.3[交通运输工程—道路与铁道工程]